1: 66 percent / pyridine / 0.5 h / 70 °C 2: 86 percent / Raneynickel / propan-2-ol / 3 h / Heating; also H2, 10percent Pd/C, NEt3, EtOAc investigated 3: 85 percent / 2M HCl / 2 h / Heating View Scheme